The question was
Could the RAF resume the nuclear deterrent as a cheaper alternative to Trident?
I guess there are those of us for whom the question is academic. It's SSBN or nothing. And then there are those of us proffering options.
Cruise missiles seem to be within the technological reach of a wide range of nations, and we have previously built medium and long-range aircraft capable of getting them within reach of a fair number of targets, so for me the answer is possibly...............whether it is better than SSBNs is another question.
For this question it turns on whether it is cheaper, not whether it is technologically possible (it seems it is) or better (not part of the original question). And as for cheaper, no idea!